I thought that the inlet on the brass tank actuallly continued downward
into the tank, maybe about 1/2 way down or so.
I've seen two types of plastic expansion tank systems. One is
pressurized (like a VW or some earlier BMWs. GM uses this now, I think -
it was on my Chevy Cavalier and my Saturn), and has the return hose on
the bottom of the tank, with the tank sitting up toward the back of the
engine compartment, above the level of the radiator. The other is not
(the radiator has the pressure cap), and the tank has a length of rubber
hose through a snap-on lid that drops down to near the bottom of the
tank, and is connected up to the radiator neck at the pressure cap.
On my 1500, there's an extra "catch tank" that has a hose coming from an
overflow port on the neck of the brass expansion tank. The catch tank
sits in the crook made by the rear of the inner weheel arch and the
footwell on the right side of the car. Seems to me the 1500 has both
systems!
-=Chris
Chris King
http://home.comcast.net/~kvcbk/
<-----Original Message----->
From: Daniel1312@aol.com
Sent: 10/27/2003 4:38:29 PM
To: soavero@yahoo.com;spridgets@autox.team.net
Subject: Re: Expansion tank design and entry poin take off
Hi Ron and list,
I've been thinking some more about A-series cooling systems and the
expansion
tank on the Crossflow 1275cc cars.
I had thought about whether or not it would be worthwhile replacing the
copper/brass/?? tank with a plastic one. However, I noted that the
Spridget tank
has the overflow feeding into the top of the tank while the plastic
tanks feed
into the bottom.
It seems to me that feeding the expansion into the bottom of the tank is
a
better idea because that way the system can draw back coolant. On the
other
hand the Spridget expansion tank has to be nearly full before it can
draw
anything back unless the suction is really strong?
Is the height of the expansion tank an issue? Does the expansion tank
inlet
have to be above the height of the radiator?
Regards
Daniel1312
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